Function resolve_transient_cell_centered_transport 

pub fn resolve_transient_cell_centered_transport(
    request: &TransientCellCenteredTransportRealizationRequest,
    requirements: TransientCellCenteredTransportRealizationRequirements,
    capabilities: &TransientCellCenteredTransportCapabilities,
) -> Result<ResolvedTransientCellCenteredTransportRealization, Diagnostic>

Resolve one explicit cell-centered transport request without fallback.

Ordinary Domain/Field/capability admission is delegated to resolve_fieldwise. This layer additionally requires an explicit TransientCellCenteredTransportCapabilities witness, adds exact Relation/state identity checks, and never substitutes another reconstruction or diffusion method.

Errors

Returns EQ0807 for an invalid plan, Relation/state identity drift, or any ordinary Field-wise capability-admission error.